What this means
The IEEE assigned the MA-L block 004046 to UDC RESEARCH LIMITED. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 00:40:46, it is UDC RESEARCH LIMITED hardware.
Frequently Asked Questions
Who owns MAC prefix 004046?
004046 is registered to UDC RESEARCH LIMITED in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. UDC RESEARCH LIMITED's block covers 16,777,216 addresses.
What devices use 004046?
Any network device with a MAC address starting 00:40:46 was manufactured by or for UDC RESEARCH LIMITED.